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Mean Well

Mean Well SDM30-48S3 DC-DC Converter - 16.5W - 36~72V in 3.3V out 5A

SKU SDM30-48S3
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Overview

SDM30-48S3 is the 3.3V output model of this series: rated current 5A, rated power 16.5W, typical efficiency 80%.

Features

  • Wide 2:1 DC input range
  • In/out capacitance1000pF
  • Protections: Short circuit / Overload / Over voltage
  • 1000VDC I/O isolation for D/D
  • Cooling by free air convection
  • Built-in remote ON-OFF control
  • 100% full load burn-in test
  • Fixed switching frequency at 225KHz
  • Low cost
  • High reliability
  • 2 years warranty

Specifications

SDM30-48S3Specifications from the official datasheet (2024-11-22 edition)

OUTPUT

DC VOLTAGE
3.3V
RATED CURRENT
5A
CURRENT RANGE
0 ~ 5A
RATED POWER
16.5W
RIPPLE & NOISE (max.)Note.2
75mVp-p
VOLTAGE TOLERANCENote.3
±3.0%
LINE REGULATION
±1.0%
LOAD REGULATION
±1.0%
TRIM OUTPUT
±13%(Typ.) output voltage

INPUT

RATED DC INPUT
12S: 12VDC 24S: 24VDC 48S: 48VDC
VOLTAGE RANGE
12S: 9.2 ~ 18VDC 24S: 18~ 36VDC 48S: 36~ 72VDC
EFFICIENCY (Typ.)
80%
DC CURRENT
12S:3.6A 24S:2A 48S:1A
IDLE CURRENT
12S:35mA 24S/48S:30mA

PROTECTION

OVERLOAD
Above 105% rated output power Protection type : Over power limiting, recovers automatically after fault condition is removed
OVER VOLTAGE
3.8 ~ 4.95V Protection type : Shut off o/p voltage, clamping by zener diode
SHORT CIRCUIT
Protection type : Constant current limiting, recovers automatically after fault condition is removed

FUNCTION

ON/OFF CONTROL
Logic "1" or open: power on Logic "0" short to Vin-: power off

ENVIRONMENT

WORKING TEMP.
-25 ~ +85℃ (Refer to "Derating Curve")
STORAGE TEMP., HUMIDITY
-25 ~ +85℃, 0 ~ 95% RH
TEMP. COEFFICIENT
±0.03%/℃ (0~50℃)

SAFETY & EMC (Note 6)

SAFETY STANDARDS
Design refer to LVD, EAC TP TC 004 approved
ISOLATION VOLTAGE
I/P-O/P:1KVDC
ISOLATION RESISTANCE
I/P-O/P:100M Ohms / 500VDC / 25℃ / 70% RH
EMC EMISSION
Compliance to BS EN/EN55032 (CISPR32) Class B, EAC TP TC 020
EMC IMMUNITY
Compliance to BS EN/EN61000-2,3,4,6,8, BS EN/EN55035, light industry level, EAC TP TC 020

OTHERS

MTBF
8083.5K hrs min. Telcordia SR-332 (Bellcore) ; 777.2K hrs min. MIL-HDBK-217F (25℃)
DIMENSION
50.8*50.8*16mm (2"*2"*0.63") (L*W*H)
PACKING
0.1Kg; 150pcs/15.8Kg/0.94CUFT
Test conditions and notes7
  1. 1. All parameters NOT specially mentioned are measured at 12,24,48VDC input, rated load and 25℃ of ambient temperature.
  2. 2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1μF & 47μF parallel capacitor.
  3. 3. Tolerance : includes set up tolerance, line regulation and load regulation.
  4. 4. Short circuit not more than 60 second.
  5. 5. DC source wires ≧5cm, an input external al capacitor 47 ~ 100uF is required.
  6. 6. The power supply is considered a component which will be installed into a final equipment. All the EMC tests are been executed by mounting the unit on a 230mm*230mm metal plate with 1mm of thickness. The final equipment must be re-confirmed that it still meets EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.” (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf )
  7. 7. The ambient temperature derating of 3.5℃/1000m with fanless models and of 5℃/1000m with fan models for operating altitude higher than 2000m(6500ft).

Technical drawings

SDM30-48S3 Block Diagram
Block Diagram
SDM30-48S3 Derating Curve
Derating Curve

Downloads

FAQ

Can I use the SDM30-48S3 to power 3.3V embedded controllers from a 36~72V supply?

Yes, this model is intended for a 36~72V input and provides a constant 3.3V output. Its 16.5W rating and 5A output current make it relevant for embedded control electronics that need a higher-current 3.3V rail. The small 50.8 × 50.8 × 16.0 mm footprint also helps in dense control hardware.

Is the SDM30-48S3 suitable for industrial logic boards or low-voltage digital electronics?

It is a sensible fit when the equipment requires regulated 3.3V and the total load stays within 5A and 16.5W. That combination is more aligned with digital logic, processors, and communication electronics than with higher-voltage loads. The constant-voltage output is appropriate for 3.3V circuits that need stable supply regulation.

Can this converter be used in automation equipment with a 48V bus and 3.3V control electronics?

Yes, a 48V bus sits inside the 36~72V input range listed for this unit. The converter steps that input down to 3.3V at up to 5A, which can suit compact automation or embedded electronics with significant low-voltage current demand. Buyers should still keep the full load within the 16.5W rating.

What is the difference between the SDM30-48S3 and the other SDM30 models in this family?

For the 36~72V input variants, this SDM30-48S3 is 16.5W at 3.3V and 5A, while the SDM30-48S5 is 25W at 5V and 5A, the SDM30-48S12 is 30W at 12V and 2.5A, and the SDM30-48S15 is 30W at 15V and 2A. The related 12V-input branch includes SDM30-12S3 at 16.5W, SDM30-12S5 at 25W, SDM30-12S12 at 25.2W, and SDM30-12S15 at 25.5W, while the 24V-input branch includes SDM30-24S3 at 16.5W, SDM30-24S5 at 25W, SDM30-24S12 at 30W, and SDM30-24S15 at 30W. The differentiators are input range and the output voltage/current combination.

Is the SDM30-48S3 meant for outdoor installations or enclosed equipment?

The temperature spec of -25°C to +85°C, with load derating at higher ambient temperatures per the derating curve, supports use across a wide operating range. However, no IP rating is listed in the provided specs, so it should be treated as a board-level or enclosed-equipment converter rather than an exposed outdoor unit. Outdoor suitability normally requires a stated ingress-protection rating in addition to temperature data.

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Mean Well SDM30-48S3 DC-DC Converter - 16.5W - 36~72V in 3.3V out 5A
Mean Well

Mean Well SDM30-48S3 DC-DC Converter - 16.5W - 36~72V in 3.3V out 5A

Log in to see price

SDM30-48S3 is the 3.3V output model of this series: rated current 5A, rated power 16.5W, typical efficiency 80%.

Features

  • Wide 2:1 DC input range
  • In/out capacitance1000pF
  • Protections: Short circuit / Overload / Over voltage
  • 1000VDC I/O isolation for D/D
  • Cooling by free air convection
  • Built-in remote ON-OFF control
  • 100% full load burn-in test
  • Fixed switching frequency at 225KHz
  • Low cost
  • High reliability
  • 2 years warranty
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